Table 3-1. Operator/Crew Preventive Maintenance Checks and Services

Table 3-1. Operator/Crew Preventive Maintenance Checks and Services

D--Daily

W--Weekly

Interval and

ITEM TO BE INSPECTED

Sequence No.

PROCEDURE

ENGINE OIL

Before operation, check level of oil in the crankcase. If the oil level is below the specified mark on the dipstick, remove the oil

filler cap and add oil to bring the level to the specified mark.

NOTE

If it takes more than two quarts of oil to bring the level up to specifications, report this condition

immediately to organizational maintenance.

AIR CLEANER

Check restriction indicator mounted next to the control panel. If it indicates that the air cleaner must be serviced, proceed as

described in paragraph 3-10. Remove the precleaner and clean out any accumulated dirt or debris

FUEL LEVEL

WARNING

Do not fill the fuel tank while the engine is running. Flammable vapors are released while the

tank is being filled, and a spark from the engine could ignite them.

Check fuel level on gage mounted on the fuel tank. Fill if necessary.

BATTERY

If the battery electrolyte level is low, fill to the proper level with distilled water or a good grade drinking water (excluding mineral

water) (para 3-12).

EXHAUST SYSTEM

Check muffler, pipes and manifold for damage and leaks. Check weather cap for proper operation.

Report damage to organizational maintenance.

GENERAL

W alk around the pump unit and visually inspect for loose or missing bolts, screws, hoses, fittings, or other parts. Be sure the

wheels are properly blocked. Check tires for 40-psi inflation and fill them if necessary.

SUCTION AND DISCHARGE LINES

Check that all line connections are tight and that lines are free from severe abrasions, cracks, flatted areas, and obstructions.

UNUSUAL OPERATIONS

During operation, check for leaking, low pumping rate, excessive noise or vibration, overheating, or other abnormal operation.

FUEL STRAINER

Check for dirt or water in the fuel bowl. Service if necessary (para 3-11).

COOLING SYSTEM

With the engine cold, open the radiator access cover on top the engine housing, and remove the radiator cap. If the coolant

level is more than 11/2 inches below the filler neck, refer the unit to organizational maintenance for service.

FAN BELT

Inspect the fan belt for glazing, cracks, or other wear. The belt must deflect 3/4 to 1 inch with thumb pressure at midpoint of

the longest belt span. Report a loose or worn belt to organizational maintenance.

HOSES AND PIPING

Inspect fuel lines, fuel pump, coolant hoses, water pump, and pump gage lines for leakage. Tighten fuel line fittings if

necessary. Report all other trouble to organizational maintenance.

PUMP

Inspect the pump suction and discharge assemblies for loose mounting or damage. Check that the pump is firmly mounted

to the chassis. The pump must be aligned carefully with the engine. Report an insecurely mounted pump to organizational

maintenance for alignment and tightening.

CHASSIS

Inspect engine shrouds and chassis frame for cracks or damage. Refer the unit to organizational maintenance for necessary

repairs.

TIRES

Fill tires to 40-psi inflation and inspect them for cuts, bruises, or blisters. Tire service is described in paragraph 3-13.

TACHOMETER DRIVE

Turn grease cup on tachometer drive clockwise two full turns to provide Tease to the gear teeth. When the grease cup is

turned down all the way, refill it with automotive grease and reinstall it. Refer to LO 5-4320-234-12 (fig. 3-1).

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